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Battery charger ICs

BQ25100

ACTIVE

Standalone 1-cell, 250-mA linear battery charger with 4.2-V charge voltage and prog. pre-charge

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Data sheet

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BQ25170 ACTIVE 800-mA linear battery charger for 1-cell Li-ion and LiFePO4 This product is an 800-mA, single cell Li-Ion and LiFePO4 battery linear charger with programmable charge voltage

BQ25100

ACTIVE
Data sheet Order now

Product details

Number of series cells 1 Charge current (max) (A) 0.25 Vin (max) (V) 6.45 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 4.2 Battery charge voltage (max) (V) 4.2 Absolute max Vin (max) (V) 30 Control topology Linear Control interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (JEITA profile), IC thermal regulation, Input OVP, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 4.45 Rating Catalog Operating temperature range (°C) 0 to 125
Number of series cells 1 Charge current (max) (A) 0.25 Vin (max) (V) 6.45 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 4.2 Battery charge voltage (max) (V) 4.2 Absolute max Vin (max) (V) 30 Control topology Linear Control interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (JEITA profile), IC thermal regulation, Input OVP, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 4.45 Rating Catalog Operating temperature range (°C) 0 to 125
DSBGA (YFP) 6 1.4000000000000001 mm² 1 x 1.4000000000000001
  • Charging
    • 1% Charge Voltage Accuracy
    • 10% Charge Current Accuracy
    • Supports Applications for Very Low
      Charge Currents - 10 mA to 250 mA
    • Supports minimum 1-mA Charge
      Termination Current
    • Ultra Low Battery Output Leakage
      Current - Maximum 75 nA
    • Adjustable Termination and Precharge
      Threshold
    • High voltage Chemistry Support: 4.35 V
      with bq25100H/01H, 4.30 V with bq25100A
  • Protection
    • 30-V Input Rating; with 6.5-V Input
      Overvoltage Protection
    • Input Voltage Dynamic Power Management
    • 125°C Thermal Regulation; 150°C
      Thermal Shutdown Protection
    • OUT Short-Circuit Protection and ISET
      Short Detection
    • Operation over JEITA Range via Battery
      NTC – 1/2 Fast-Charge-Current at
      Cold, 4.06 V (bq25100/01) or 4.2 V
      (bq25100H/01H) at Hot
    • Fixed 10 Hour Safety Timer
  • System
    • Automatic Termination and Timer
      Disable Mode (TTDM) for Absent Battery
      Pack
    • Available in Small 1.60 mm × 0.90 mm
      DSBGA Package
  • Charging
    • 1% Charge Voltage Accuracy
    • 10% Charge Current Accuracy
    • Supports Applications for Very Low
      Charge Currents - 10 mA to 250 mA
    • Supports minimum 1-mA Charge
      Termination Current
    • Ultra Low Battery Output Leakage
      Current - Maximum 75 nA
    • Adjustable Termination and Precharge
      Threshold
    • High voltage Chemistry Support: 4.35 V
      with bq25100H/01H, 4.30 V with bq25100A
  • Protection
    • 30-V Input Rating; with 6.5-V Input
      Overvoltage Protection
    • Input Voltage Dynamic Power Management
    • 125°C Thermal Regulation; 150°C
      Thermal Shutdown Protection
    • OUT Short-Circuit Protection and ISET
      Short Detection
    • Operation over JEITA Range via Battery
      NTC – 1/2 Fast-Charge-Current at
      Cold, 4.06 V (bq25100/01) or 4.2 V
      (bq25100H/01H) at Hot
    • Fixed 10 Hour Safety Timer
  • System
    • Automatic Termination and Timer
      Disable Mode (TTDM) for Absent Battery
      Pack
    • Available in Small 1.60 mm × 0.90 mm
      DSBGA Package

The bq2510x series of devices are highly integrated Li-Ion and Li-Pol linear chargers targeted at space-limited portable applications. The high input voltage range with input overvoltage protection supports low-cost unregulated adapters.

The bq2510x has a single power output that charges the battery. A system load can be placed in parallel with the battery as long as the average system load does not keep the battery from charging fully during the 10 hour safety timer.

The battery is charged in three phases: conditioning, constant current and constant voltage. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if an internal temperature threshold is exceeded.

The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current and voltage regulation loops and charge termination. The pre-charge current and termination current threshold are programmed via an external resistor on the bq2510x. The fast charge current value is also programmable via an external resistor.

The bq2510x series of devices are highly integrated Li-Ion and Li-Pol linear chargers targeted at space-limited portable applications. The high input voltage range with input overvoltage protection supports low-cost unregulated adapters.

The bq2510x has a single power output that charges the battery. A system load can be placed in parallel with the battery as long as the average system load does not keep the battery from charging fully during the 10 hour safety timer.

The battery is charged in three phases: conditioning, constant current and constant voltage. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if an internal temperature threshold is exceeded.

The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current and voltage regulation loops and charge termination. The pre-charge current and termination current threshold are programmed via an external resistor on the bq2510x. The fast charge current value is also programmable via an external resistor.
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BQ25175 ACTIVE Standalone 1-cell 800-mA linear battery charger in a WCSP package Supports 800-mA charging current in a smaller package

Technical documentation

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Type Title Date
* Data sheet bq2510x 250-mA Single Cell Li-Ion Battery Chargers, 1-mA Termination, 75-nA Battery Leakage datasheet (Rev. C) PDF | HTML 18 Nov 2014
Technical article Choosing the right battery charger for your portable medical device design PDF | HTML 22 Jan 2018
Technical article The future of wearable biosensors and linear chargers PDF | HTML 04 Dec 2017
Technical article How to choose the right linear charger for your application PDF | HTML 17 Nov 2017
Analog Design Journal Battery-charging considerations for low-power applications 26 Apr 2016
Product overview Battery Management Solutions for Wearable and Fitness Devices (Rev. C) 18 Aug 2014
EVM User's guide User's Guide for WCSP Packaged bq25100 Battery Charger EVM 06 Aug 2014

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

BQ25100EVM-654 — Battery Charge Solution for Single-Cell Li-Ion Battery-Powered Systems Evaluation Module

The bq25100 evaluation module (EVM) is a complete charger module for evaluating the WCSP packaged 250mA battery charge solution for single-cell, Li-Ion battery-powered systems used in low power portable applications. It offers ultra-small package size and ultra-low battery leakage current which is (...)

User guide: PDF
Not available on TI.com
Gerber file

Linear Charger NTC Calculator

SLUC670.ZIP (350 KB)
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Reference designs

TIDA-00881 — 50mA Wireless Charger with 19mm Coil BoosterPack Reference Design

The TIDA-00881 reference design is a booster pack that provides a wireless charger and an entire battery managment solution to power any low power TI Launchpad. This design is a  highly integrated power management solution that is well-suited for ultra-low power applications using an off the (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00668 — 50mA Wireless Charger Booster Pack Reference Design

The TIDA-00668 is a booster pack that provides a wireless charger and an entire battery managment solution to power any low power TI Launchpad. This design is a highly integrated power management solution that is well-suited for ultra-low power applications.

The primary method of storage is an (...)

Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00318 — Qi (WPC) Compliant Wireless Charger for Low Power Wearable Applications

This reference design is suitable for low power wearable devices including a Qi-compliant wireless receiver (bq51003) and ultra-low current 1-cell Li-ion linear charger (bq25100). It features an ultra-small size (5 x 15 mm2), capable of low-charging currents down to 10 mA and up to 250 mA with (...)
Test report: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
DSBGA (YFP) 6 Ultra Librarian
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